init

migrations/migrateSonnet1mToSonnet45.ts

@@ -0,0 +1,48 @@
+import {
+  getMainLoopModelOverride,
+  setMainLoopModelOverride,
+} from '../bootstrap/state.js'
+import { getGlobalConfig, saveGlobalConfig } from '../utils/config.js'
+import {
+  getSettingsForSource,
+  updateSettingsForSource,
+} from '../utils/settings/settings.js'
+
+/**
+ * Migrate users who had "sonnet[1m]" saved to the explicit "sonnet-4-5-20250929[1m]".
+ *
+ * The "sonnet" alias now resolves to Sonnet 4.6, so users who previously set
+ * "sonnet[1m]" (targeting Sonnet 4.5 with 1M context) need to be pinned to the
+ * explicit version to preserve their intended model.
+ *
+ * This is needed because Sonnet 4.6 1M was offered to a different group of users than
+ * Sonnet 4.5 1M, so we needed to pin existing sonnet[1m] users to Sonnet 4.5 1M.
+ *
+ * Reads from userSettings specifically (not merged settings) so we don't
+ * promote a project-scoped "sonnet[1m]" to the global default. Runs once,
+ * tracked by a completion flag in global config.
+ */
+export function migrateSonnet1mToSonnet45(): void {
+  const config = getGlobalConfig()
+  if (config.sonnet1m45MigrationComplete) {
+    return
+  }
+
+  const model = getSettingsForSource('userSettings')?.model
+  if (model === 'sonnet[1m]') {
+    updateSettingsForSource('userSettings', {
+      model: 'sonnet-4-5-20250929[1m]',
+    })
+  }
+
+  // Also migrate the in-memory override if already set
+  const override = getMainLoopModelOverride()
+  if (override === 'sonnet[1m]') {
+    setMainLoopModelOverride('sonnet-4-5-20250929[1m]')
+  }
+
+  saveGlobalConfig(current => ({
+    ...current,
+    sonnet1m45MigrationComplete: true,
+  }))
+}